Issue 23 July/August 2020
Image courtesy of Glazing Vision
PLUS:
SMARTER, BRIGHTER HOME DESIGN USING DAYLIGHT
DAYLIGHT & SUNLIGHT PLANNING ENERGY EFFICIENCY HEALTH & WELLBEING NEWS LATEST PROJECTS AND MORE
Energy saving with rooflights? We wrote the book/s. Artificial lighting accounts for almost 20% of global energy consumption, so effective
NARM Technical Document NTD01.2
NARM Technical Document NTD04
2017
2009
An introduction to natural daylight design through rooflighting
A dynamic thermal modelling study of a typical metal clad building to evaluate overheating in the UK Report 090110BRE Prepared by Oxford Brookes Universtity Oxford Institute for Sustainable Development, Oxford 10th January 2009 Authors: Chris Kendrick & Shaun Wang
daylighting is a priority in sustainable construction. Independent research commissioned by NARM, proves conclusively that rooflights save
Issued in partnership with
energy in many applications – and we’ve published a range of informative technical documents for specifiers, covering different aspects of energy saving with
NARM Technical Document NTD10
NARM Technical Document NTD06.2
2014
2014
Designing with Rooflights Supporting Part L Building Regulation guidance in England; Approved Documents L1A, L1B, L2A and L2B (2013 editions)
Analysis of Improving Daylighting and Lighting Controls on a Number of Existing Non-Domestic Buildings
An independent report by Elmhurst Energy
Understanding rooflight U-values Welcome to this ‘Quickguide’: part 3 of a series published by NARM, to provide busy roofing contractors and installers with quick access to the information they need to maintain professional and compliant working practices. Requirements of The Building Regulations For all non-domestic applications, the worst acceptable standard for the thermal performance (U-value) of rooflights in new build work is stated as 2.2 W/m2k. For refurbishment or domestic applications, this figure is reduced to 1.8 W/m2k.
rooflights. They’re all freely
U-values for flat or ‘in-plane’ rooflights As the U-value is calculated by dividing the heat loss through the rooflight by its area, this is straightforward for flat, ‘in-plane’ type rooflights. Therefore, manufacturers’ quoted figures can generally be used to form the basis of building calculations without further consideration.
downloadable from our website.
U-values for ‘out-of plane’ rooflights Many rooflights are out-of-plane designs that sit proud of the plane of the roof (typically mounted on upstands or kerbs). The range includes modular dome or pyramid rooflights, continuous barrel vaults, and glazing bar systems. Furthermore, rooflights may be mounted onto upstands designed and supplied by others, which can effectively be considered as part of the roof, or some rooflights (particularly individual dome and pyramid modular rooflights) can be supplied as an assembly with a pre-manufactured kerb matched to the rooflight itself. Building Regulations state that the worst acceptable U-values for rooflights are based on the developed area of the rooflight (not the area of the roof aperture, which is the true U-value). This is termed the Ud-value, and can be calculated for either a rooflight alone, or for a rooflightand-kerb assembly.
Be enlightened at:
www.narm.org.uk
Rooflighting Best Practice Quickguide 03
Issued in conjunction with the National Association of Rooflight Manufacturers
Ud-values: the correct values for checking against limiting values in The Building Regulations The Ud-value is calculated from the developed area of the
rooflight. Where a rooflight-and-kerb assembly is being supplied, the rooflight supplier should be able to quote this value both for the rooflight only, AND for the entire assembly. To ensure Building Regulations compliance, both of these values must achieve the worst acceptable standard of 2.2 W/m2k. It is not acceptable to use an assembly of a rooflight with poorer thermal performance (such as double skin rooflights) on a kerb simply because the Ud-value for the rooflight-and-kerb assembly is better than the limiting values in the Building Regulations, unless the Ud-value for the rooflight alone also meets the limiting values. Full details are provided in NARM Technical Document NTD 2 ‘Assessment of thermal performance of out-ofplane rooflights’ which can be downloaded from the NARM website. Typical ‘out-of plane’ rooflight Entire surface area of rooflight & kerb assembly Surface area of rooflight
Minimum daylight area Roof opening area
Minimum acceptable thermal performance standards to ensure Building Regulations compliance: Rooflight only:
Rooflight & kerb assembly:
2.2 W/m2k 2.2 W/m2k
Further information Further information can be obtained from NARM, (National Association of Rooflight Manufacturers) at www.narm.org.uk
RIBA accredited CPD materials Available
THE TRADE ASSOCIATION REPRESENTING LEADING UK ROOFLIGHT SUPPLIERS
CONTENTS
REGULARS
05
Editor’s Comment
06
Industry News
10
New Projects
16
NARM Daylight Diary Updates from the UK’s influential trade association for rooflight manufacturers
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Daylighting Icons
FEATURES
DAYLIGHTING is published by: Bennett B2B Ltd Pure Offices Lake View House Tournament Fields Warwick CV34 6RG United Kingdom TEL: +44 (0)1295 711666
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Daylight & Sunlight Planning How lockdown has changed the way we view daylight and sunlight within our homes Toby Rogan-Lyons of Lichfields explains why awareness of the need for daylight & sunlight in homes, is increasing.
EDITOR Paul Bennett paul@daylightingmag.co.uk Tel: 01295 711666 Mobile: 07900 895110 AD SALES info@bennettb2b.co.uk Tel: 01295 711666
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Daylighting in Residential Properties Optimise living space creatively with rooflights NARM, the National Association of Rooflight Manufacturers, looks at ways to enhance and expand living spaces using daylight
DESIGN/PRODUCTION info@bennettb2b.co.uk Tel: 01295 711666 WEBSITE www.daylightingmag.co.uk
18
‘Commercial grade’ blinds for domestic applications Guthrie Douglas discusses applications for its TESS™660 system. 23
L’Hemisfèric, Valencia
32
Twitterings
24 Energy Efficiency
What’s trending on social media?
What’s the connection between a daylight system and a solar airplane? Steve Brennan of Techcomlight explains.
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26
More about DAYLIGHTING Magazine Back issues & media information
www.daylightingmag.co.uk
Health & Wellbeing More daytime light = better sleep and mood The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute in New York, USA, investigates the impacts of working from home or quarantining indoors due to the COVID-19 pandemic.
CIRCULATION Daylighting is available by email, free of charge to subscribers, by logging on at www.daylightingmag.co.uk Free access is also available via our website and social media. Average impressions per issue are approximately 5,500, however this varies according to social media activity. Our readership is predominantly UK architects, specifiers, contractors, consultants and roofing professionals. Full details are available on our website. www.daylightingmag.co.uk While every effort is made to ensure the accuracy of content, the publisher does not accept liability for errors. The views expressed by contributors are not necessarily those of the editor or publisher. This publication contains editorial photographs which may have been supplied and paid for by suppliers. Full terms and conditions can be found on our website.
Front cover: This Private home in the Netherlands features a large bespoke walk-on rooflight from Glazing Vision, enabling plenty natural daylight into a newly built basement conversion, whilst maintaining outdoor space. See article on page 20 for other ways to open up new possibilities for living space using daylight.
July/August 2020
3
ENGINEERING
THE UK’S TRUSTED DAYLIGHTING & VENTILATION SPECIALIST • Preferred supplier to leading architects, engineers & contractors • Multi-sector expertise • Design, manufacture, installation, servicing • All relevant accreditations & affiliations • RIBA CPD Providers Network member • Nationwide sales & support
Head Office: 01506 448140 Midlands Centre: 01788 579307 E: info@lareineengineering.com www.lareineengineering.com
EDITOR’S COMMENT
Daylighting in the world of distancing – and other current topics As we head towards the Autumn, the Covid-19 pandemic is still occupying headlines around the world, despite the best efforts of scientists, politicians and others.
indoors due to the Covid-19 pandemic on individual daily light exposures, and how this may be affecting sleep quality and psychological health. You can read their article on page 28.
Whilst he ‘new normal’ still appears to be some way off, many organisations and individuals are successfully adapting to new, safer ways of going about their business – and huge efforts are being made to accommodate the need for distancing.
Many of us are spending more time in our homes, so our feature on daylighting in domestic properties is also topical right now. Regular contributor NARM, the National Association of Rooflight Manufacturers, provides an insight into different ways that daylighting solutions can open up new possibilities for living spaces on page 20.
This issue carries two articles with reference to the pandemic, from different perspectives. On page 14, planning expert Toby Rogan-Lyons looks at how lockdown has changed the way we view daylight and sunlight within our homes.
Energy efficiency is another crucial topic right now, with continuing reports of the unwanted effects of global warming – so Steve Brennan’s article on page 26 makes interesting reading.
The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute in New York, USA, is investigating the impacts of working from home or quarantining
As always, if you’d like to comment or get in touch, please email me using the link opposite.
Paul Bennett paul@daylightingmag.co.uk
Issue 20 January/February 2020
THE INNOVATION ISSUE Issue 16 May/June 2019
IN THIS ISSUE:
DAYLIGHT MODELLING REFURBISHMENT SMART GLAZING PLUS • NEWS • PROJECTS • AND MORE
IN THIS ISSUE:
DYNAMIC SHADING
Don’t forget, back issues are always available to read on-line at daylightingmag.co.uk Previous issues of DAYLIGHTING Magazine will be available on-line indefinitely. So you can refer back to old issues whenever you like. It’s also on our ‘to-do’ list to set up a features index, so if you can’t remember in which issue you read that fascinating feature about XYZ, you’ll be able to find it in a moment.
AND OTHER WAYS TO COMBAT EXCESSIVE HEAT & GLARE • 5 REASONS TO AVOID UNDER-SPEC ROOFLIGHTS • DAYLIGHTING IN MUSEUMS & PUBLIC SPACES • ROOF SAFETY • PROJECT NEWS AND MORE
www.daylightingmag.co.uk
July/August 2020
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INDUSTRY NEWS
UK construction rebounds as site reopenings gather pace
Scottish Construction Now has reported that the phased return of work on construction sites across the UK resulted in a sharp turnaround in the performance of the sector last month with the fastest rise in activity for nearly two years. The headline seasonally adjusted IHS Markit/CIPS UK Construction Total Activity Index jumped to 55.3 in June, from 28.9 in May, the steepest pace of expansion since July 2018. Output volumes lifted while new orders stabilised after three months of sharp declines and purchasing activity expanded at the fastest rate since December 2015. Higher levels of business activity were overwhelmingly linked to the reopening of the UK construction supply chain following stoppages and business closures during the early stages of the coronavirus
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pandemic. Residential building was the best-performing area of construction activity in June. Around 46% of survey respondents noted an increase in housing activity, while only 27% experienced a reduction. The latest expansion of residential construction work was the steepest for just under five years. Commercial work and civil engineering activity also returned to growth in June, although the rates of expansion were softer than seen for house building. New business volumes increased marginally in June, which ended a three-month period of decline. However, the rate of new order growth was far weaker than seen for business activity, reflecting ongoing hesitancy among clients and longer lead-times to secure new contracts.
infrastructure projects was a key source of growth in June. Tim Moore, economics director at IHS Markit, which compiles the survey said: “As the first major part of the UK economy to begin a phased return to work, the strong rebound in construction activity provides hope to other sectors that have suffered through the lockdown period. “While it has taken time for the construction supply chain to adapt and rebuild capacity after widespread business closures, there is now clear evidence that a return to growth has been achieved. “While some survey respondents commented on cautious optimism about their near-term prospects, construction companies continued to face challenges securing new work against an unfavourable economic backdrop and a lost period for tender opportunities. At the same time, operating expenses are rising due to constrained capacity across the supply chain and the impact of social distancing measures. “Looking ahead, construction firms are more confident than at any time since the start of the COVID-19 pandemic. However, the ongoing reductions in staffing numbers seen in June provide a stark reminder that underlying conditions across the sector are a long way off returning to those seen before the public health emergency.” www.scottishconstructionnow. com
A number of construction firms noted that new work related to
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INDUSTRY NEWS
DfE readies firms for ‘new deal’ schools building push Construction Enquirer has reported taht the Department for Education (DfE) is gearing up for a major school building push promised by Boris Johnson as part of his Covid-19 infrastructure recovery programme. Over £1 billion will be released shortly to fund the first 50 projects of an ambitious, 10-year school rebuilding programme, starting from 2020-21. These first projects will be confirmed in the Autumn, and construction on the first sites will begin from September 2021.
Now more than 30 contractors on the existing £8 billion schools framework face a fight for places ahead of the new panel of preferred contractors being selected for next year. Under the existing arrangement, works were divided across 22 lots by region and project value. How the next framework will be organised is still to be determined, but is unlikely to be as complex as the challenge is on to find economies of scale.
The three month campaign, which launched in June, is aimed at young couples and families and will show viewers how installing roof windows can make a huge difference to an extension and help them create the perfect space for an evening in. As part of the partnership, VELUX have also created a dedicated online hub, hosted by Sky Media, where homeowners can get more information around
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The new market engagement event will gather feedback from contractors and supply chains, to inform the design of the new framework, the level of interest from the market and best procurement strategy. www.constructionenquirer.com
The DfE is attempting to shift delivery to modern methods
VELUX partners with Sky Media to launch TV ad campaign Leading roof window manufacturer VELUX has partnered with Sky Media to launch a TV campaign to highlight the benefits of using roof windows to maximise daylight in a single-storey extension and transform it into the perfect living space.
of construction and earlier this year unveiled its offsite construction partners to deliver around 30 schools a year with an estimated pipeline of up to £3 billion over the next four years.
how to make the most of an extension to their property. Andrew Lumsden, Senior Marketing Manager at VELUX, said: “We’re really excited to launch our new campaign together with Sky across its entertainment channels.
Health & Safety in Roof Work: Revised guidance from HSE The 2020 edition of HSG33 – Health and Safety in Roof Work is now available to download from the HSE website.
“We know how important it is for people to maximise the amount of daylight in their homes and working with Sky allows us to deliver a message that will help people to extend their family time in a space filled with natural daylight using our world leading roof windows, blinds and smart home technology.”
This fifth edition contains guidance on how to plan and work safely on roofs. It covers new buildings, repair, maintenance, cleaning work and demolition. It also includes some guidance for people not directly carrying out work on a roof, such as clients, designers and specifiers. This guidance will be useful to anyone planning, arranging or supervising roof work.
The online hub can be visted at
Download the document at:
www.sky.com/velux
www.hse.gov.uk/pubns/ books/hsg33.htm
July/August 2020
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INDUSTRY NEWS
UL Publishes Lighting Design Guideline for Circadian Entrainment government and other sources. “Diverse industry participation and feedback enabled us to produce DG 24480, an industry-leading document that lighting designers can use as an option in their work,” stated Adam Lilien, global business development manager at UL.
Underwriters Laboratories (UL), a world leader in safety and performance testing and certification services, has announced the publication of DG 24480, Design Guideline for Promoting Circadian Entrainment with Light for Day-Active People. The first edition of the Design Guideline creates an optional baseline performance goal for indoor lighting specifiers and building owners to consider when seeking circadian entrainment in addition to quality illumination. For over 100 years, designers have designed indoor lighting primarily to accommodate illumination for tasks, essentially for the horizontal work surface. This publication furthers the understanding of lighting’s impact on human health and well-being by adding design guidelines for indoor light that enters the human eye (vertical photopic illuminance). Alternate approaches utilizing different assumptions about the spectral sensitivity of the circadian system are also discussed.
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The DG 24480 approach utilizes the circadian stimulus (CS) method for specifying circadian-effective light, and the included recommendations have been tested in field studies demonstrating that light that promotes circadian entrainment will lead to better sleep, mood and behavior. In a task force led by Mark Rea, Ph.D. and professor of cognitive science at the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute, UL managed the procedures, including two public comment processes during which lighting design professionals, facility owners, lighting manufacturers, sleep scientists and others provided constructive input. According to Dr. Rea, “Lighting isn’t just for vision anymore. It’s high time we had a valid, agreedupon metric and some basic guidelines so that healthy lighting can be effectively delivered to benefit society.”
DG 24480 incorporates a quick guide with six steps to achieve the goals with specific lighting levels and times of day, a specification guide with worked examples and details of supporting research findings. The 65 cited research publications span five decades and emanate from the fields of neurobiology, endocrinology, physiology, illumination engineering, anthropology and sleep medicine. While the field is evolving, these optional nonvisual performance goals of DG 24480 can help guide applications successfully achieve measures that benefit building occupants. You can view DG 24480 for free or download it for $75.00. To create an account and access the Design Guideline, visit: www.shopULstandards.com
Underwriters Laboratories (UL) is the largest and best known independent, not-for-profit testing laboratory in the world. Based in Northwood, Illinois, UL maintains services for companies looking to test products for international markets.
The task force relied on a cross section of expertise from industry, academia, medicine,
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INDUSTRY NEWS
Cautious welcome for PM’s pledge Wrightstyle, the Devizesbased supplier of advanced glazing systems, has cautiously welcomed the government’s pledge to “build, build, build.” But the company, while welcoming many of the prime minister’s plans, sees “a fundamental gap between rhetoric and real commitment.” Wrightstyle points to the latest report from the Chartered Institute of Building (CIOB), and says that the government is continuing to underestimate the importance of the sector. The CIOB report suggests that the economic influence of the UK construction sector is almost double that of officially recorded figures from the Office of National Statistics (ONS). The Real Face of Construction 2020 report says that the sector accounts for about 6% of UK economic output and
provides employment for 2.3 million people. That employment total, about 7.1% of the UK workforce, doesn’t include hundreds of thousands employed within other related businesses, including architects, engineers, builders’ merchants and plant hire providers. The prime minister said that he wants to use the coronavirus crisis as an opportunity to “to build the homes, to fix the NHS, to tackle the skills crisis, to mend the indefensible gap in opportunity and productivity and connectivity between the regions of the UK”. But Wrightstyle believes that, with the economy having shrunk by 20% in April alone, the government’s pledge doesn’t go nearly far enough. It supports the CIOB’s report that
argues that, if all aspects of the design and construction process were included in government figures, construction GDP could be close to double in size. “As a sector, we have the skills and capacity to create the jobs and new opportunities that this country so badly needs,” said Jane Embury, a director of Wrightstyle. “But we don’t believe that the government is going nearly far enough in putting in place the new investments that are needed.” “While we therefore welcome the government’s pledge for investment, we believe it won’t deliver the outcomes the government is seeking that that there is a fundamental gap between rhetoric and real commitment,” she said. www.wrightstyle.co.uk
NARM safety guidance on glass endorsed by ACR risk of glass debris falling onto building occupants in the event of a shattered pane: a risk that is present when toughened glass (sometimes referred to as safety glass) is used.
As the UK’s leading independent authority on rooflight specification, NARM, the National Association of Rooflight Manufacturers, publishes technical guidance on all aspects of specification, with a strong focus on safety. For many years, the association has recommended the use of laminated glass inner panes for glass rooflights. This removes the
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This position has now been further endorsed by ACR, the Advisory Committee for Roofsafety, a body dedicated to making working on roofs safer. Founded in 1998 by HSE, ACR comprises representatives of major roofworking federations and associations, and HSE. In its new Information sheet 5 ‘Glass Specification in Flat Rooflights’, ACR reiterates NARM guidance, stating that: ‘It is difficult to see how the use of a toughened rather than laminated
glass inner pane doesn’t present a risk to anyone beneath the rooflight. The ACR, in common with the Centre for Window and Cladding Technology (CWCT) and the National Association of Rooflight Manufacturers (NARM), strongly believes that any realistic risk assessment will lead to the selection of laminated glass.’ This action brings further prssure on BSI to amend its BS 55162: 2004 standard, in which toughened panes currently are allowable, subject to a risk assessment. Download the document here: www.the-acr.org For further information, visit www.narm.org.uk
July/August 2020
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NEW PROJECTS Nørrebro Library, Copenhagen In a fusion of community recreation in Copenhagen’s Nørrebro district, the local library has moved into a disused tram depot. In its day, the depot was topped by ridgelights, and these have now been recreated with respect for the building’s original architecture. The contemporary version from VELUX Commercial also offers the option of adjusting the daylighting using blinds and creating a pleasant indoor climate by means of natural ventilation. www.commercial. velux.co.uk Aberdeen Station
www.twinfix.co.uk
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Photo: G.G. Archard
As part of an £8 million refurbishment programme at one of Scotland’s busiest railway stations, 10,000 existing glass panels needed replacement. These were replaced by Twinfix, with their innovative Multi-LinkPanel NF (Non-Fragile) roof-glazing system with 6mm solid obscure Georgian wired effect polycarbonate. Approximately 8000 square metres were installed.
www.daylightingmag.co.uk
NEW PROJECTS Sporting d’Hiver complex, Monte Carlo Located adjacent to the famous Hôtel de Paris, this newly completed complex is a stunning 250 € million development which includes mixed-use pavilions and the city’s most prestigious casino. Guthrie Douglas’s TESS™640 shading system was specified for its unique spring mechanism which holds fabric flat regardless of the installation angle.The mechanism is concealed, so the blind is almost invisible when retracted. www.guthriedouglas. com
Private home, Beckenham, Kent This project required a bespoke roof glazing solution for the home owners’ kitchen extension. LAMILUX supplied their Glass Roof PR60, which is available with customised shapes and design and in this case was constructed and installed to encompass the 38° ridge, along a clear length of 3.8 metres, for maximum light intake – with dual powder coating to the framework. www.lamilux.co.uk
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July/August 2020
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DAYLIGHT & SUNLIGHT PLANNING
Lockdown has changed the way we view daylight and sunlight within our homes NUMEROUS studies demonstrate the positive impact natural light has on both our physical and mental health and, with recent reports on the effects vitamin D and UV light have on the Covid-19 virus, general awareness of natural light is rising. Toby Rogan-Lyons, Planning Director, Neighbourly Matters at Lichfields, explains...
Previous work and schooling practices meant that most people would have only a limited time in their homes during the day. However, the present restrictions have led to a dramatic increase in this, and increased levels of home-working are likely to feature for some time. All this is leading to an upsurge in awareness of the impact our home environment has on us as individuals, with natural light forming a significant element of that. This, coupled with the good weather experienced across the UK during lockdown - May saw record sunlight hours - will have instilled occupants with a, perhaps elevated, expectation of light within their homes. However, expressing this understanding in a measurable way will always be problematic; terms such as ‘light’ and ‘airy’ are subjective.
When undertaking studies to assess the effects a proposed development may have on the natural light amenity of both neighbouring properties and future residents, the guidance given in Building Research Establishment document 209 (Site Layout Planning for Daylight and Sunlight, a guide to good practice, 2011, BRE Report) is most often used, and reports based on this guidance are expected by most planning authorities for new developments.
The BRE Report
“ In urban areas the proportion of sky visible from within buildings is often restricted and the targets provided in the BRE Report are difficult to achieve.”
The BRE Report provides numerous tests used to assess daylight and sunlight striking windows and the penetration of daylight within spaces. These tests provide absolute and comparative numerical results and are used by consultants and planning officers to judge a development’s impacts on natural light. However, there is endless debate on
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DAYLIGHT & SUNLIGHT PLANNING
Sunlight penetration at 4 pm
the interpretation of these results when it comes to effects on peoples’ lives. Daylight and sunlight consultants will often discuss the appropriateness of the targets provided in the BRE Report. The daylight targets within the BRE Report are based on what proportion of the sky is visible to a test point and not on the quality of the light experienced within a space. In urban areas the proportion of sky visible from within buildings is often restricted and the targets provided in the BRE Report are difficult to achieve. Whilst this urban area disparity is discussed in the BRE Report alternative absolute targets are not provided and it is left to Planning Authorities and officers to interpret, or accept, what is appropriate.
Heated debates All of this often leaves any interested parties baffled and confused,
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BS EN 17037 view analysis
leading to heated debates at public consultations and planning committees. It is difficult to convince a neighbouring occupier or Committee member that the proposed 20-storey tower, to be built close to a property, will leave that property with appropriate levels of daylight and sunlight when the building will form a major part of residents’ outlook. In June of last year the British Standard (BS 8206 part 2) which provided the basis for the guidance contained in the BRE Report was superseded by a new standard (BS 17037). This standard introduces a number of new tests and definitions to the current daylight and sunlight testing practices.
Revised methodologies The revised methodologies are significantly different from the previous testing approach and are based on
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DAYLIGHT & SUNLIGHT PLANNING providing a more accurate assessment of natural light within buildings.
Increased awareness and scrutiny
The move away from the previous simplified calculations has been brought about by the advances in simulation technology and the need to provide practical guidance for natural light in urban areas.
It is expected that more people and community groups will scrutinise planning applications and be driven to comment. As such, local planning officers are likely to call for clarity in natural light testing.
It is hoped that use of the revised testing methods will provide clarity, at least for proposed accommodation, as the tests are predominantly based on the intensity and duration of natural light within a room.
When providing daylight and sunlight analysis, consultants will need to be aware of the rise in public awareness and tailor their reports to be more accessible, or face criticisms of trying to bamboozle committees and the public.
With occupiers having a greater perception of natural light, increased interaction with their immediate community and the likelihood that they will be spending a greater amount of time at home, awareness of events that effect community and property is likely to rise.
As an industry we will need to simplify the results of detailed analysis and express them in ways that relate to perceptions of light, perhaps providing some form of standardised terminology - dim, pleasant, well-lit, bright, glaring relating to result values.
“ It is hoped that use of the revised testing methods will provide clarity, at least for proposed accommodation, as the tests are predominantly based on the intensity and duration of natural light within a room.”
www.lichfields.uk
Design for Sketchup: MBS Software announces a major update MBS Software has announced a major update to its popular ‘Daylight for Sketchup’ software.
plugin to continue using the same licence.
Users are advised that there are are a number of significant changes and it is important that the setup installer should be downoaded from the MBS website at: https://www.mbs-software. co.uk/downloads/
The main functional changes are the addition of both ADF (Average Daylight Factor) and DD/NSL (Daylight Distribution / No Sky Line) but there is also a completely new user interface, which MBS claims will be friendlier and more intuitive.
The Company has indicated that existing users can install this on top of their currently installed
The video tutorials remain in place and will be updated shortly – and there is a completely updated
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HELP / FAQ section with subheadings in the left margin which cascade to around 40 + pages of the most commonly asked questions. MBS has confirmed that technical support is, as always, available from Ali and Jiva by phone 01903 689000, email or anydesk. For further information, visit: www.mbs-software.co.uk
www.daylightingmag.co.uk
SPECIAL FEATURE
daylight diary Putting safety first – in more ways than one
July/Aug
ust
2020
As the ‘voice’ of the UK’s rooflight industry, NARM, The National Association of Rooflight Manufacturers, has always placed safety at the top of its agenda regarding rooflight specification. Right now, as the uncertainty surrounding the Covid-19 pandemic continues, we’re redoubling our efforts in respect of a particular aspect of safety. For many years, we have recommended the use of laminated glass inner panes for glass rooflights. This removes the risk of glass debris falling onto building occupants in the event of a shattered pane: a risk that is present when so called toughened glass is used. We are currently working with other trade associations and our communications team, to broaden awareness of this issue and exert pressure on BSI to amend its BS 55162: 2004 standard, in which toughened panes currently are allowable, subject to a risk assessment.
NARM is currently conducting all meetings via Zoom or other collaborative technologies
Our recent general meeting and subsequent Marketing Committee meetings have all been carried out ‘virtually’ by delegates either working from home or from Covid-safe office environments. Whilst this way of working is new to many of us, our commitment to safety, energy efficiency and other key aspects of rooflighting best practice, remain unchanged. You can find out more about NARM and download our technical documents at: www.narm.org.uk
You’ll be hearing more from NARM on this subject and others in the near future.
Access our on-line RIBA CPD seminar and other CPD materials at: www. ribacpd.com
In the meantime, it should be mentioned that this work and other NARM initiatives, are all being undertaken with Covid safety in mind.
Become a NARM member
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Stay up-to-date with NARM on LinkedIn and Twitter
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DAYLIGHTING IN RESIDENTIAL PROPERTIES
Optimise living space creatively, with rooflights Everyone knows that rooflights are all about providing more natural daylight – but you should also consider how they can create new and often unexpected ways to make more of valuable living spaces. Ian Weakford, representing NARM, the National Association of Rooflight Manufacturers, shares a few ideas… Mention the word ‘rooflight’ and most people would think of a typical, hinged ‘roof window’ for use in pitched roofs, or one of the increasingly popular flat glass rooflights for flat roofed extensions. However, the term ‘rooflight’ can be applied to a huge range of different products, all designed with the primary aim of delivering high levels of natural daylight to building interiors, but each offering different options in terms of aesthetics and functionality. So, if you’re planning on a selfbuild project, or maybe involved in renovating or re-modelling an existing property, here are a few ideas to consider:
Roof terraces with a daylightinspired twist If the property has any areas of flat roofing, have you ever considered the possibility of creating a roof terrace? These are becoming increasingly popular in urban areas where living accommodation and outdoor spaces come at a premium – and rooflights can play a big role in their success. First, you’ll need to consider the roof construction and confirm that it can support floor loadings. Easy access can then be gained to the terrace using
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Image courtesy of Glazing Vision
sliding box-type skylights. These units are available in a variety of glazing configurations designed to be fitted within the existing building structure, together with an internal staircase from the room below. They provide easy, secure access for regular use, plus the added benefit of natural daylight flooding into the staircase and the room below. For maximum daylight utilisation below the terrace, you could also consider ‘walk-on’ rooflights, set into the floor substrate of the terrace. These make a stunning feature and a real talking point. Non-slip, ‘obscure’ glazing can be specified for safety and privacy,
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DAYLIGHTING IN RESIDENTIAL PROPERTIES
Image courtesy of Glazing Vision
Image courtesy of Roofglaze
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DAYLIGHTING IN RESIDENTIAL PROPERTIES
Image courtesy of Lareine Engineering Ltd
without overly compromising light transmission. It’s important to note, however, that walk-on rooflights are designed to floor loadings, so they are much thicker, heavier, and usually significantly more expensive than conventional rooflights (which should never be walked on).
Flood the basement – with daylight! Many older properties feature useful basement space which is often used only for storage, simply because without natural daylight, a basement isn’t a particularly pleasant place to spend time in. Walk-on rooflights are actually seethrough flooring. So what’s to stop them being used inside a property, to allow daylight to penetrate the floor? In this way, a properly tanked, waterproofed basement can be transformed into comfortable and
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healthy living space. Positioning the walk-on rooflight in close proximity of an external window can deliver a high level of daylight to the basement below. Basements rarely extend beyond the external walls of a property, but where this is the case, the options are even greater, with the possibility of setting walk-on rooflights into paved external areas above the basement.
Convert loft areas to living space Everyone knows that on suitable properties, loft conversions are the simplest and most cost-effective way to maximise living space – and there are many options on the market for delivering daylight under roof spaces. Dormer windows are an effective solution, but can be costly to construct and may contravene local planning regulations.
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DAYLIGHTING IN RESIDENTIAL PROPERTIES
Image courtesy of The Rooflight Company
For the majority of properties with pitched roofs, roof windows installed ‘in plane’ with the pitch of the roof, are the ideal and cost-effective solution. These can be hinged to allow ventilation and easy cleaning. A wide range of designs are available, including ‘heritage-styled’ roof windows, which mimic traditional designs and may provide a solution for building owners in conservation areas.
Extend the property - with minimal loss of daylight in adjoining rooms A drawback for some ground floor extensions, is the resulting reduction in light levels in the room adjoining the extension. Carefully positioned rooflights can overcome the problem, bringing high levels of natural daylight to the extension and the adjoining room, as well as providing an attractive feature.
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For flat-roofed extensions, lanterntype designs, or the very popular flat glass rooflights, are ideal. It’s worth remembering that depending on the size and aspect of the room, rooflights can deliver up to three times the amount of daylight compared to vertical windows. For areas with ceilings under a pitched roof, ’light tubes’ can provide an effective solution. These are rooflights mounted over a reflective tube which penetrates the roof cavity and delivers daylight via a translucent fitting in the ceiling of the room below.
Think outside the box and create a stunning feature The first and obvious function of every rooflight, is to increase light levels. However, with so many designs available, there are countless options for creativity. As the UK
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DAYLIGHTING IN RESIDENTIAL PROPERTIES trade body representing rooflight manufacturers, NARM (National Association of Rooflight Manufacturers) is made aware of interesting rooflight applications all over the country. One fascinating and possibly unique example is a private home in Scotland with a home observatory, facilitated by an opening rooflight which allows a high powered telescope a clear view of the sky (right). In others, rooflights have been positioned to create aesthetic features or changing lighting effects. Others still feature automatic opening mechanisms, connected to rain sensors, thermostats, remote controls and even software-controlled building management systems. The possibilities are endless. For further information about rooflighting, including a rooflight gallery and case studies, visit: www.narm.org.uk
Image courtesy of Glazing Vision
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DAYLIGHTING IN RESIDENTIAL PROPERTIES
‘Commercial grade’ blinds for domestic applications An innovative tensioned blind system designed for large scale commercial environments is now being used to enhance rooflights and sloped glazing in the residential sector, as well as in leisure and education.
Guthrie Douglas are well known for their engineering of bespoke blinds for complex buildings such as airports, office developments, and commercial centres, where fit and function cannot be compromised, contract deadlines cannot be missed, and long warranty periods must be adhered to. But recently, many shading suppliers have started taking advantage of these ‘commercial-grade’ systems for smaller projects closer to home. Guthrie Douglas claims that its compact TESS™660 system in particular is being selected more and more by suppliers who are after a blind that will work well for skylights and rooflights in homes and schools time and time again
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without being called back to sort out problems on site. The new ‘recess-fix’ model, allows for 2 systems to be completely concealed in almost the same space as a single system, and the adjustable side guides allow for easy installation and blackout functionality even when the opening is not completely square. The TESS™660 ultra-smooth motor comes with obstacle detection as standard, ‘soft-start, soft-stop’ functionality for that extra wow-factor for residential clients, and can even be programmed to run at varying speeds. Images and videos of the system in action are available at: www.guthriedouglas.com/tess660
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ENERGY EFFICIENCY
The connection between a daylight system and the first round-theworld trip by a solar airplane? Steve Brennan of Techcomlight explains the answer: The Solar Impulse Efficient Solution Label...
Bertrand Piccard and André Borschberg set out and accomplished something that still seems impossible today: the First Round-The-World Solar Flight, powered only by the sun, with no fuel or polluting emissions. In line with the Piccard Family tradition of scientific exploration and protection of the environment, Solar Impulse wanted to demonstrate that clean technologies can achieve impossible goals.
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The record breaking solo flight of 5 days and 5 nights without fuel from Nagoya to Hawaii gives a clear message : everybody could use the plane’s technologies on the ground to halve our world’s energy consumption, save natural resources and improve our quality of life. This message will continue to be spread by the pilots to the general public, students, key decision-makers and entrepreneurs all over the world.
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ENERGY EFFICIENCY Boosting the adoption of profitable solutions to protect the environment To address environmental challenges while enabling economic growth, Bertrand Piccard has launched, through the Solar Impulse Foundation, the challenge to select 1000 solutions, that can protect the environment in a profitable way and present them to decision-makers to fast-track their implementation. A way to take the success of the solar-powered flight around the world further.
The Solar Impulse Efficient Solution Label Solatube are extremely proud to be one of the first 500 solutions to be granted the Solar Impulse Efficient Solution Label. The Solar Impulse Efficient Solution Label is a symbol: a trademark, that carries the pioneering and innovative spirit of the Solar Impulse adventure. It is granted to solutions that meet high standards of both sustainability and profitability, through a strict assessment of the following criteria: 1. Technological feasibility 2. Environmental and socio-economic benefit 3. Profitability Solatube tubular daylighting systems have become the ideal solution for lighting dark interiors in a costeffective, energy-efficient and ecofriendly way because they significantly reduce the need for electricity whilst keeping people connected to the outdoor natural environment. The incorporation of patented optical technologies significantly improves the way daylight is captured and delivered to interiors.
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Solatube Daylighting Systems are modular and easy to install. And unlike traditional skylights, they are designed to control the problematic aspects of sunlight by reducing glare and inconsistent light patterns. They also screen infrared rays that can overheat interiors as well as ultraviolet rays that can fade soft furnishings and fixtures.
Key features •Can provide up to 100% of the interior lighting needs with sunlight. •Can save up to 37 000 kWh and reduce CO2 emissions by up to 30,000 kg over its lifetime. •One Solatube unit can provide over 4 500 USD in savings over its lifetime. For more information regarding the Solar Impulse Foundation visit: https://solarimpulse.com/efficientsolutions/solatube-tubular-daylighting
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HEALTH & WELLBEING
More daytime light = better sleep and mood The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute in New York, USA, is investigating the impacts of working from home or quarantining indoors due to the COVID-19 pandemic on individual daily light exposures, and how this may be affecting sleep quality and psychological health.
In May 2020, the LRC invited people who had been staying home due to the pandemic to complete a short survey about their sleep, mood, and daily light exposure. A total of 708 people responded to the survey. LRC researchers analyzed the data to understand how daily indoor light exposure, time spent outside, and time of day spent outside affected
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sleep quality, sleep-related impairment, anxiety, stress, depression, and mood. Of the survey respondents, only those who were unemployed and staying at home, or employed and working from home were included in the analysis, approximately 600 people, total. The results revealed that daily indoor light exposure and time spent outside had a major impact on all survey out-
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HEALTH & WELLBEING
comes, including sleep disturbances, sleep-related impairment, anxiety, stress, depression, and mood. Compared to people with “somewhat dim” to “very dim” indoor lighting, people with “somewhat bright” to “very bright” lighting, including having windows without (or with open) curtains or shades, or having several lights turned on, reported: • Fewer sleep disturbances • Less anxiety and depression • Feeling less tired or less irritable • Feeling generally happier and more positive • Less sleep-related impairment “Sleep quality and mood significantly improved when people spent the majority of their time in a brighter, compared to dimmer, location in their
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homes,” said LRC researcher Charles Jarboe, who led the study. “If you can add a little more light to your space during the day — one extra lamp, or open your window shades, for example, it could help you feel better, and improve your sleep.” Another especially important factor was the amount of time spent outdoors. The survey results revealed that people who spent one to two hours outdoors each day reported feeling significantly less anxiety, stress, and depression, and reported that they slept better than those who spent less than 30 minutes outdoors each day. The impact leveled off after two hours, however. Morning light provided the greatest benefits. “Our results show that just one hour spent outdoors each day can help you feel your best, and can help you sleep
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HEALTH & WELLBEING better at night,” said LRC Director Dr. Mariana Figueiro, one of the world’s leading experts in the area of light and health. The survey results also revealed slightly higher than average overall scores for anxiety. Given the extraordinary nature of the current times, there are many factors that contribute to psychological and emotional health outcomes that are more severe than in normal circumstances. The higher scores for anxiety may be a reflection of this. However, for all outcome measures, the strong trends exist that one would normally expect in relation to overall light exposures and time spent outside during the day, indicating that our daily habits and establishment of a robust 24-hour light–dark pattern has a significant impact on our health and wellbeing, even during trying times. It is also worthy of note that a potential benefit of working or quarantining at home is that individuals can have more control over their environment, such as setting up their workspace facing an open window. Individuals can also benefit from flexibility in their work schedule, and can choose to work or take breaks outside, which may not be an option when working at the office. These factors can increase daily light exposure, which has many benefits, as revealed in the survey.
How Does Light Impact Sleep? Light has to enter the eye to be effective for circadian entrainment. People in modern society usually spend more than 90% of their time indoors, yet lighting in the built environment, especially in homes, is typically not bright enough to stimulate the circadian clock. Typical indoor lighting provides less than 100 lux at the eye, whereas being outside on a sunny day will provide anywhere from 1,000 to 3,000 lux on a cloudy morning to as much
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as 100,000 lux at the eye on a bright sunny day. We now know that most people are not getting enough light during the day. Unfortunately, too little light during the day is compounded by too much light at night. Many people use luminous electronic devices like smartphones and tablets in the evening or stay up late working on the computer. Light from these screens makes the brain think it’s time to wake up, just as you’re getting ready for bed. Disruption of the 24-hour rhythm of light and dark affects every one of our biological systems from DNA repair in single cells to melatonin production by the pineal gland in the brain. Circadian disruption is most obviously linked with disruption of rest–activity patterns, which can cause sleepiness during the day and insomnia at night—but is also linked with increased risk for diabetes, obesity, cardiovascular disease and certain types of cancer.
“Exposure to a robust 24-hour light–dark cycle promotes circadian entrainment, which has many health benefits such as increased alertness and feelings of vitality during the day, improved mood, and better sleep at night.”
Exposure to a robust 24-hour light– dark cycle promotes circadian entrainment, which has many health benefits such as increased alertness and feelings of vitality during the day, improved mood, and better sleep at night. Underwriters Laboratories (UL) recently published a Design Guideline explaining how electric lighting can be specified during the day to support circadian entrainment for occupants of commercial, industrial and educational facilities. Developed for public benefit, DG 24480 is a significant first step, providing the foundation for lighting innovations and practices that serve the public better than is common today. Some of these design guidelines may be adopted to home offices so that those working at home get more daytime light.
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HEALTH & WELLBEING
Using the Power of Light to Sleep Better & Feel Better
Don’t forget to turn the extra lights off in the evening, mimicking sunset.
Good sleep is essential for good health, and may even have a protective effect against coronavirus, because a healthy, regular sleep pattern promotes a strong immune system. Dr. Figueiro recommends the following tips to help you sleep better and feel better every day.
• In the evening, use warm, low-level, dim lighting and turn off your screens one to two hours before bedtime. The intense glow from an electronic screen can make it harder for you to fall asleep. www.lrc.rpi.edu About the Lighting Research Center
• Seek light during the day, especially in the morning. • If the sky is clear and the sun is shining, go for a 30-minute walk or run every morning at the same time. Morning light provides the most health benefits. • If you must stay indoors during the daytime, work facing the windows. Open the window curtains or shades to let in daylight. • If you don’t have a window in your workspace, add more fixtures. For example, if you have one table lamp near your desk, add three additional ones.
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The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute is the world’s leading center for lighting research and education. Established in 1988 by the New York State Energy Research and Development Authority (NYSERDA), the LRC conducts research in light and human health, transportation lighting and safety, solid-state lighting, energy efficiency, and plant health. LRC lighting scientists with multidisciplinary expertise in research, technology, design, and human factors, collaborate with a global network of leading manufacturers and government agencies, developing innovative lighting solutions for projects that range from the Boeing 787 Dreamliner to U.S. Navy submarines to hospital neonatal intensive-care units. In 1990, the LRC became the first university research center to offer graduate degrees in lighting and today, offers a M.S. in lighting and a Ph.D. to educate future leaders in lighting. Learn more at www.lrc.rpi.edu.
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DAYLIGHTING ICONS The biggest: the best: the most awe-inspiring; the most outrageous; the most influential... In this regular feature we indulge ourselves and our readers with images of daylighting projects throughout the years that simply deserve a double page photograph...
L’Hemisfèric, Valencia, Spain Architect Santiago Calatrava’s L’Hemisfèric is one of the main structures within the City of Arts and Sciences in Valencia, Spain. The design, by architect Santiago Calatrava, is inspired by the shape of the human eye, and houses an IMAX theatre, a Planetarium and a Laserium. The “pupil” is the hemispherical dome of the IMAX theatre and the “eyelid” opens and closes using hydraulic lifts to operate the steel and glass shutter, controlling levels of daylight within the structure. The building is situated on a dried up riverbed and the architect wanted to bring water back to the area by creating a reflecting pool adjacent to the building. This also serves as a stunning artistic display at night when the lighting creates an image of a whole eye.
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DAYLIGHTING ICONS
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DAYLIGHTING MAGAZINE
DAYLIGHTING Magazine back issues Click on the cover images below to open back issues Issue 2 Jan/Feb 2017
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DESIGN & TECHNOLOGY FOR BETTER BUILDINGS
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EDITOR Paul Bennett paul@daylightingmag.co.uk Tel: 01295 711666 Mobile: 07900 895110 WEBSITE www.daylightingmag.co.uK
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